*{
    margin:0px;
    padding:0px;
    font-family: "微软雅黑","Microsoft YaHei", Regular;
    font-size: 12px;
    box-sizing:border-box;
    -moz-box-sizing:border-box; /* Firefox */
    -webkit-box-sizing:border-box;
}

img{
    border: 0;
    display: block;
}
a{text-decoration: none}
ul li{list-style: none;}
/******清楚浮动******/
.clearfloat:after{
    display: block;
    content: "";
    height: 0px;
    clear: both;
    visibility: hidden;
}
.l{
    float: left;
}
.r{float: right;}
.clear-b{clear:both;}
.w{width: 1200px;margin: 0 auto;text-align: center;}